Carbolite 3216CC Controller - Manual (Page 11)

Operating
11 LMC20-GB
5.2 Dwell Timer
A dwell timer is used to control a process at a fixed temperature for a defined period. At the
end of the time period the controller will switch off the output power to the elements.
Press scroll
 until the display shows TM.CFG <TIMER CONFIGURATION>. Using the Up 
Down
 select Dwel
When Dwell parameter is selected, the Timer resolution ( TM.RES), Time duration (DWELL),
Timer threshold ( THRES) functions become available.
Press scroll
 until the display shows TM.RES < Time resolution >. Use the Up 
Down
 to select the timer units in Min or Hours.
Press scroll
 until the display shows DWELL < SET TIME DURATION >. Use the Up 
Down
 to enter the time duration required.
Press scroll
 until the display shows THres < TIMER THRESHOLD >. Use the Up 
Down

to select the temperature threshold that you require the timer to start at.
The threshold value is ±n around the setpoint (n=threshold value).
Example: If the set point is set to 800°C and the timer threshold is set to 2, after the timer is
activated will not start until the process value reaches 798°C if ramping up or 802°C if it is
cooling.
Note: If the threshold is set to
OFF, the timer will either; start to count down as soon as it is
activated with the mode keys or if a ramp rate has been set (see section 4.1), the timer will
start as soon as the ramp reaches the set point. (See Section 6.1)
5.3 Delayed Switch On Timer
The delayed switch on timer is used to switch on the output power to the elements after a
set time period.
Press scroll
 until the display shows TM.CFG <TIMER CONFIGURATION>. Using the Up 
Down
 select dELY
When delay parameter is selected, the Timer resolution (
TM.RES), Time duration (DWELL),
functions become available .
Press scroll
 until the display shows TM.RES < Time resolution >. Use the Up 
Down
 to select the timer units in Min or Hours.
Press scroll
 until the display shows DWELL < SET TIME DURATION >. Use the Up 
Down
 to enter the time duration required, before the output power switches on.